Copenhagen climate talks

Just a week to go now until what has been described in the UK parliament as the most important international negotiations since the second world war. What is at stake is a massive shift in the global economy and a huge transfer of funds from the rich to the poor world. Today we ask optimistic economist Lord Nicholas Stern and pessimistic environmentalist George Monbiot how likely they think a deal will be. Fred Pearce reflects on the benign geological period that has nurtured human civilisation. And Elizabeth Kolbert of The New Yorker gives the view from America.